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作 者 ：李潮海,栾丽敏,尹飞,王群,赵亚丽

期 刊 ：生态学报 2005年 25卷 4期 页码：824~830

关键词：玉米；基因型；遮光；生长发育；产量；

Keywords:maize, genotype, shading, growth, yield,

摘 要 ：以不同基因型玉米为材料,在玉米生长发育的3个主要阶段(苗期、穗期、粒期)进行分期遮光试验,研究不同时期弱光胁迫对不同基因型玉米生长发育和产量的影响。结果表明,遮光延缓了玉米叶片的出生速度,使叶片变薄;遮光可以延缓叶片的衰老,但遮光解除后则加速叶片的衰老;遮光造成植株高度增加,但恢复正常光照后,其株高却逐渐低于对照;遮光使干物质积累下降,抽雄吐丝日期推迟,尤其是吐丝日期推迟更多,并使产量降低,但不同基因型玉米不同遮光处理下降程度不同。试验的4个品种中,掖单2 2和豫玉2号受遮光影响较小,而掖单36 38和丹玉13受影响较大,即不同基因型玉米对弱光胁迫的敏感性不同。

Abstract:Light is one of the most important factors affecting corn (Zea mays L.) production. The light saturation point of corn is much higher than that of most other crops, allowing corn to take advantage of the higher light intensity. During the growing season, however, corn frequently encounters low light intensities that restrict growth capacity, therefore limiting the grain yield. The level of photosynthetic active radiation (PAR) can markedly change the growth environment, which directly impacts photosynthesis...

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